For the orthographic projection as a map projection, see Orthographic projection in cartography. For mathematical discussion in terms of linear algebra, see Projection (linear algebra).
Bullfrogs are the largest real frog found in North America, weighing up to 0.5 kg and measuring 460 mm in length. Their average length is 100-175 mm. Their color varies from brownish to shades of green, often with spots or blotches of a darker color around their backs. Their back feet are fully webbed.
1 Bullfrogs are the largest frogs in North America. 2  After hatching they can remain as tadpoles for one to three or more years depending on conditions. 3  Male bullfrogs stake out and defend their territory from any male frog intruder. Bullfrogs are the largest frogs in North America. 2  After hatching they can remain as tadpoles for one to three or more years depending on conditions. 3  Male bullfrogs stake out and defend their territory from any male frog intruder.